Ribbon mechanism.



E. G. LATTA.

RIBBON MECHANISM.

APPLlcMloN mw Nov. 21. |911.

Patented Jan. 18, 1916.

4 SHEETS-SHEET l.

f/w eg 5. v

E. G. LATTA.

RIBBON MECHANISM.

APPLlcATIoN FILED Nov. 21,'1911.

i'li

Patented Jan. 18, 1916.

4 SHEETS-SHEET 2.

E. LATTA.

RIBBON NIECHANISNI.

APPLICATION F1150 Nov. 21, 1911.

Patented Jan. 18, 1916.

4 SHEETS-SHEET 3.

E. G. LATTA.

RIBBON MECHANISM.

APPLICATION FILED Nov.21, 1911.

Patented Jan. 18, 1916.

4 SHEETS-SHEET 4.

EMMIT G. LATTA, SYBACUSE, NEW YORK.

RIBBON MECHANISM.

incassa.

Application filed November 21, 1911i Serial No. 661,516.

' State of New York, have invented a new and useful Improvement in Ribbon Mechanism, of which the following is a specification.

This invention relates more particularly to improvements in ribbon operating mechanisms for visible writing or front strike typewriting machines. The mechanism is designed especially for use on a collapsible front strike typewriter of the construction disclosed in my application for patent, Serial No. 658,153, filed Nov. 2, 1911, and is herein illustrated and described in connection with such machine, but it is not thereby intended to limit the use of the invention to machines of that character since the ribbon operating mechanism is applicable to other kinds of typewriters.

The objects of this yinvention are to provide eiiicient and desirable mechanism of simple, compact and inexpensive construction for feeding the ink ribbon lengthwise, for automatically reversing the direction of feed of the ribbon when it reaches the end of its travel in one direction, and for vibrating the ribbon to and from the position for printing; also to provide a ribbon vibrating mechanism of very compact and simple construction by which the throw of the vibrator can be quickly and easily changed to permit the use of different portions or fields of the ribbon; also to provide a ribbon operating mechanism for collapsible typewriting machines which is constructed and arranged so as to enable the machine to be collapsed into compact form.

In the accompanying drawings consisting of four sheets: Figure 1 is a fragmentary longitudinal sectional elevation of a collapsible typewriting machine provided with ribbon operating mechanism embodying the invention. Fig. 2 is a sectional elevation of the ribbon vibrating mechanism, showing the normal position thereof. Fig. 3 is a similar view showing the elevated position thereof when adjusted for usingv the upper portion of the ribbon. Fig. 4 is a similar view showing the elevated position thereof when adjusted for using the lower portion of the' ribbon. Fig. 5 is a fra mentary transverse sectional elevation of t e machine in line 5 5, Fig. 1. Fig. 6 is a front elevation of Specification of Letters Patent.

Patented J in .t the'ribbon vibrating me han1sm. Flg. 7 is a fragmentary plan view of the machine. Fig. 8 1s a sectional plan view ofthe vibrating mechanism. Fig. 9 is a plan view, partly 1n horizontal section, of the ribbon feeding and feed reversing mechanism. Fig. 10 is a front elevation thereof.

Like reference characters refer to like parts in the several figures.

A represents the rotatable paper platen of a front strike typewriting machine, A the carriage on which the platen is ournaled, B the type bars, b the segment on which the type bars are pivoted to swing upwardl and rearwardly to strike the platen, and one of'the type bar-actuating linger keys` which are supported by key levers c c con` lroiected by links c2 and rods c3 tothe type ars.

The machine illustrated in the drawings is the same as that disclosed in the above mentioned application, and the parts above mentioned are preferably constructed and arranged as in the machine of said application. Each of the type bars is provided with a plurality of type or characters and the segment is movably mounted and adapted to be shifted for placing one or another set of the characters in printing relation to the platen.

The type bars and their key actions are mounted on a base or stationary section D of the main frame of the machine while the carriage is mounted on a movable frame section D. Each of these parts consists of a rigid substantially rectangular frame. rlhe movable frame is larger than and surrounds the stationary frame and is pivoted thereto at its front end by pivots at opposite sides of the machine, one of which is indicated at d, Fig. 1. The carriage travels horizontally on a Vsuitable guide or trackd supported on the rear cross bar d2 of the movable frame. rlhe movable frame is vadapted to supporty the carriage in the elevated operative position, shown inFig. 1, and to be moved to lower the carriage to an inoperativeA position in rear of the type bar segment for collapsing the machine, as explained in said application.

E represents Athe universal bar which is arranged to be struck by the type bars as they approach the platen and which, as usual, is connected to the carriage "escapement, so as to cause a letter space movement attached at'their upper ends to the ends of a pair of parallel rock shafts e3 e4 which are suitably journaled to lugs on a bracket e5 which is secured in any suitable manner to the rear cross bar d2 of the movable frame D. One of the arms e2, see Figs. 2-4, and 7, has an auxiliary arm e7 pivoted thereto and extendingrearwardly to a pivotal connection with an upright link e8 which is conlnected at its upper end to the escapement lever of the carriage escapement e, so that the escapement is actuated by the operation of the universal bar.YV A spring e9 connected to the arm c2 and to the bracket e5 acts to hold the universal bar syieldingly in its no1'- mal position, see Fig. 2. The universal bar is arranged above and substantially concentric with the type bar segment in position to be struck by the type bars in each of the three positions of the segment. The type bars strike the universal bar near their longitudinal centers.

F represents the ink ribbon and G G2 the ribbon spools, which may be of ordinary construction and are preferably of a size suitable for a full length standard ribbon one-half inch wide. The spools rest on the upper sides of inwardly extending parts g g of the movable frame D, and these parts are preferably made with semi-circular guards g2 which surround the front and outer edges of the spools. The spool shafts g3 are journaled in bearings on the parts g g of the frame and are provided with any suitable meansfor causing the spools to turn therewith. The ribbon passes from one spool to the other and is slowly wound from one spool onto the other by feed mechanism, preferably constructed as follows:

H represents a carriage driving spring drum or motor, which, as usual, has'an internal operating spring, and is connected to the carriage by a belt or cord t. The` drum is rotatably mounted under the rear cross bar Z2 of the movable frame Dw and has a scroll cam h on its upper side which en- .gages a pin or part k2 depending from a feed bar I which is seated and adapted to reciprocate parallel with the direction of travel of the carriage in a guide groove Z in the rear cross bar @Z2 under the carriage track. This feed bar is provided at opposite ends with rigid portions or arms 'Z' which extend forwardly through wide slots i2 in the cross bar d2 and are provided at their forward ends with 'spring actuated pawls lo 162 which"'coperate with wheels K K2 secured to the lower ends of the spool shafts for rotating the ribbon spools. As shown, the ratchet wheels have downwardly facing teeth, and the pawls are made of sheet metal and pivoted betweenupturned lugs on the arms of the feed bar, being pressed upwardly toward the ratchet wheels by springs les, Figs. 7 and 9, surrounding their pivots. When the carriage is drawn to the right to start a new line the cam on the spring drumy H forces the feed bar I to the left, and as the line is being written the cam and pin move the feed bar in the opposite direction, thus reciprocating the bar and the feed pawls lc 702. The feed pawls are controlled, by a feed reversing mechanism which holds one pawl out of action, while permitting the other pawl to engage and turn its ratchet wheel. One spool is thus rotated intermittently and feeds the ribbon in one direction. When the ribbon is nearly unwound `from one spool, feed reversing mechanism operates to throw the active pawl out of action and place the other pawl into action to cause the ribbon to .be wound on the other spool and fed in the opposite direction. K3 K4 represent two k'springpressed dogs which are pivoted underneath the frame parts g g and act to prevent backward motion of the ratchet wheels during the return strokes of the feed pawls.

The feed reversing mechanism is preferably constructed as follows: L L2 represent two reversing levers which are suitably pivoted at their rear ends under the frame cross bar Z2 to swing horizontally. These levers have upright front portions adjacent to the ribbon spools provided with guide slots Z through which the ribbon passes, and the ribbon is provided near each end with an obstruction Z adapted to engage and move the adjacent reversing lever. The levers are caused to swing together by a connecting bar Z2 which extends across the machine in front of the carriage and is pivoted to the reversing levers, `and springs Z3 connected to the levers and to the supporting frame assist in shifting the levers. These springs are arranged to,swing across the pivotal axes of the levers during the movement of the levers and operate to complete the movement of the levers in both directions and to hold them in either position to which they are shifted.

M M2 represent pawl controlling plates which are suitably pivoted to the frame D and extend adjacent to the edges of the ratchetwheels. Each plate extends over lattheir lower ends to fixed pivots m2, supported below the frame D. The knuckle pin of the toggle joint m extends between two lugs or lingers m4 m5 on the adjacent end of the connecting bar Z2 and the knuckle pin of the other toggle joint m2 extends between corresponding lugs lm m7 on the opposite end ot' the connecting bar, see Fig. 9.

In the position of the parts shown in the drawings the toggle joint m is straightened and holds the pawl controlling plate M up ott of the pawl and dog for the ratchet wheel K. while the other toggle joint is bent, permitting the plate M2 to hold the pawl and dog down out of engagement with the ratchet wheel lf2. lVhen the toggle joints are straightened they are moved slightly bevond a dead center position, so as to be retained in this position and hold the controlling plates up by the pressure of the plates thereon, The pawl 7: is then active and turns the ratchetwheel K to wind the ribbon on the left hand spool G. When the ribbon is nearly unwound from the right hand spool G2, as shown, the obstruction Z on the right hand end of the ribbon engages and moves the reversing lever L2. As soon as the lever is moved past its central position the springs Z2 act to throw the reversing i .levers L L2 and connecting bar Z2 quickly to the left, and the lug m5 on the bar strikes and breaks the toggle joint m while the projection m2 strikes and straightens the toggle joint m2. The plate M is thus lowered and throws the pawl 7c and companion holding dog out of action and the plate M2 is raised, permitting the pawl 7a2 and companion dog to come into action. The right hand spool G2 will then be turned and wind the ribbon thereon until the obstruction on "the other end of the ribbon strikes and similarly operates the reversing lever L to again reverse the feed of the ribbon.

The lugs m4 m5 and m m7 on the connecting bar Z2 are spaced so as to allow lost motion and permit the reversing levers to move past their central positions before the-lugs act on the toggle joints m m2, and the toggle joint that is on the dead center retains that position until suddenly forced off center by the same movement of the bar Z2 that forces the other joint onto the dead center position. The feed reversing mechanism is thus operated by a slight pull on the ribbon and acts quickly and positively, and the described construction overcomes the well known fault of a point where both spools are connected to the feed mechanism, or where neither spool is so connected.

The described mechanism turns both spools in the same direction, the ribbon passing around one spool from the rear and around the other from the front. As the reversing levers are in the same relation to the spools there is slightly more strain on the ribbon when reversing from one direction than from the other, but the strain is not sufficient to be objectionable, and the construction makes a most compact, eiiicient and inexpensive ribbon feeding and feed reversing mechanism.

N represents a ribbon guide or vibrator for vibrating the ribbon to and from the printing position in front of the printing point on the platen. The vibrator, which may be constructed and mounted to reciprocate in any suitable manner, is actuated by a vibrator lever O, to which it is detachably connected, for instance, by a projection on the lower end of the vibrator entering a notch in the frontl end of the lever. The vibrator lever is suitably pivoted at its rear end, on the under side of the bracket e5 and is connected, at different distances from its pivot, by links ;0 p', respectively, to rockarms p2 p2 of different lengths. These rockarms are loosely pivoted on the rock shaft e3 which supports and is rocked by the universal bar E. One or the other of these arms p2 p2 is adapted to be connected with the rock shaft e2, so as to rock therewith for producing a longer or shorter throw of the vibrator. For this purpose the arms 792 p2 are arranged in slots in a block Q which is rigidly secured on the rock shaft e2. The arms and block are provided with transverse holes which register when the vibrator lever is in the normal or rest position.

q q represent two slides arranged to slide on the rock shaft e3 at opposite sides of thc block Q and provided with pins g2 Q3 projecting therefrom into the hole in the block Q. In the position of the slides, shown in Fig. 8. the pin g2 extends through the hole in the short rock arm p2 and the other pin is withdrawn from the hole in the long rock arm 772. The short arm will then be connected to the rock shaft e2 and produce a short throw of the vibrator, indicatedv in Fig. 3, appropriate for using the upper position or field of the ribbon.. By moving the slides q g to the right the pin q2 will be withdrawn from the hole in the short arm 7a2 and the other pin g2 will be moved into the hole in the long arm p2 and connect this arm to the rock shaft. rThe throw of the vibrator will then be increased, as indicated in Fig. 4, sufiiciently for using the lower portion or field of the ribbon. The slides q o shown, have tubular extensions g4, Fig. 8, to limit their movement on the rock shaft e2, and have extensions Q5 which meet in front of the block Q. A detent spring 9G secured to the arm e is adapted to snap into notches in the extensions 15 to hold the slides in position to connect either the rock-arm p2 or the arm p2 with the rock shaft.

R represents a bar for shifting the slides g g to change the throw of the vibrator lewardly to a point where it can be conveniently operated. The link 1' is slidably mounted, for instance, by a screw 1" passing through a slot therein into the frame bar d2, and has a pin 74"' entering a hole in the slide bar R, or is otherwise detachably connected to the bar, so as to permit the bar to be detached from the machine with the bracket e5. By moving the front end 'of the key lever S to the left as far as it will go, the slide bar R will withdraw the pin-g3 from the arm y2 and move the pin g2 into the arm p3, and the lower field of the ribbon will thus be brought into use. A depending central lug r on the slide bar R acts, when the upper field is in action, to limit the upward movement of the vibrator lever to the exact distance required, as indicated in Fig. 3. The body of the slide bar is of the proper width to similarly limit the movement of the lever when the lower field is in action, as indicated in Fig. 4. This overcomes a quite common fault, as after some wear on the pivots of the vibrating mechanisms in general use, the ribbon is thrown too high.

The slide barRis adapted to move considerably farther than is necessary to effect the change in Held of the ribbon, the object of this being to permit the key lever S to be placed in a central position and the slide g moved by hand to withdraw the pin g3 from the arm 722 to disconnect the vibrator lever from the control of the universal bar, and thus silence the vibrator. When it is desired to restore the vibrator to action the movement of the key lever S to the right for the upper field, or to the left for the lower field, is all that is necessary. The described construction of the vibrating mechanism provides for the use of a bichrome ribbon, and for stencil work without removing the ribbon, and all within the very small space available in a collapsible typewriter.

It will be observed that the entire mechanism for feeding the ribbon, reversing the feed and vibrating the ribbon is mounted on the movable frame D and is constructed so as to be exceedingly compact and so as not to interfere with the collapsing of the machine. When the movable frame D is lowered the type bar segment extends up between the ribbon spools, which are located in front of the carriage, and the ribbon operating mechanism descends to a position in rear bf the segment. yWhile the mechanism is thus especially adapted for a collapsible typewriter of the construction mentioned, it

will be evident that it is also applicable to non-collapsible machines. The preferred constructionl of the mechanism'has been described, but this construction can be changed 1n various details without departing from the spirit of the invention. For instance, the sliding feed bar can be connected to the driving motor and to the spools in otherA ways, and the ribbon reversing levers can be differently arranged. Also means of other construction can be used for changing the throw of the ribbon vibrator.

I claim as my invention:

lc In a typewriting machine, the combinatlon of a series of type bars, a universal bar arranged at an elevation above the pivoted ends of the type bars in position to be actuated by the type bars, a rock shaft in the upper part of the machine having arms which movably support said universal bar, a rock arm on said roly shaft, a ribbon vibrating lever, and an operative connection between said vibrating lever and said rock arm, substantially as set forth.

2. In a typewriting machine, the combination of a series of type bars, a universal bar arranged to be actuated by said type bars, a rock shaft having downwardly extending arms in rear of said universal bar, pivotal connections between said arms and said universal bar, a rearwardly extending arm on said rock shaft, a ribbon vibrating lever pivotcd in rear of said universal bar, and an operative connection between said vibrating lever and said rearwardly extending arm, substantially as set forth.

3. In a typewriting machine, the combination of a series of type bars, a universal bar arranged to be actuated by said type bars, a rock shaft having supporting arms in rear of said universal bar, pivotal connections between said arms and said universal bar, a rearwardly extending arm on said rock shaft, a ribbon vibrator. a vibrating lever pivoted at its rear end in rear of said rock shaft and connected at its front end to said vibrator, and an operative connection between the central part of said vibrating lever and said rearwardly projecting arm, substantially as set forth.

4. In a typewriting machine, the combination of a series of type bars, a rock shaft having downwardly extending arms, a universal bar movably supported by said arms in position to be actuated by said type bars, a rearwardly extending arm on said rock shaft, a ribbon vibrator arranged in front of said rock shaft, a vibrating lever pivotcd in rear of said rock shaft and extending forwardly under said shaft and connected to said vibrator, and a link connecting said vibrating lever to said rearwardly extending arm, substantially as set forth.

5. In a typewriting machine, the combination of a series of type bars, a universal bar, a rock shaft which movably supports said universal bar in position to be actuated by said type bars, a ribbon vibrating lever, a pair of arms loosel mounted on said rock shaft, links connecting said arms to said vibrating lever'at different distances from its fulcrum, and means for operatively connecting either of said arms to said rock shaft, substantially as set forth.

`l6. In a typewriting machine, the combination of a series of type bars, a universal bar, a rock shaft which movably supports said universal bar in position to be actuated by said type bars, a ribbon vibrating lever, arms of different lengths loosely mounted on said rock shaft, links connecting said arms to said vibrating lever, and means for operatively connecting one or the other of said arms to said rock shaft to rock therewith, substantially as set forth.

7. In a typewriting machine the combination of a series of type bars, a universal bar, a rock shaft which movably supports said universal bar in position to be actuated by said type bars, a ribbon vibrator, a vibrating lever pivotally mounted at its rear end and connected at its front end to said vibrator, a pair of rearwardly extending arms loosely mounted on said rock shaft,

links connecting said arms to the central part of said vibrating lever, and means for operatively connecting one of said arms to and disconnecting said other arm from said rock shaft, substantially as set forth.

8. In a typewriting machine, the combination of a series of type bars, a universal bar which is actuated by the type bars, a ribbon vibrating lever, means -for operatively connecting said vibrating lever to said universal bar to cause the lever to move different distances, and an actuating bar for said connecting means having parts for positively limiting the movement of said v1- brating lever to the exact distances intended, substantially as set forth.

9. In a typewriting machine, the comblnation of a series of type bars, a universal bar which is actuated by said type bars, a ribbon vibrating lever, means for operatively connecting said vibrating lever to said universal bar to cause the leverto move d1fferent distances, and an actuating bar for said connecting means which is movable transversely of said vibrating lever and provides stops for limiting the movement of the lever to the exact distances intended, substantially as set forth.

10. In a typewriting machine, the combination of a series of type bars, a universal bar actuated by said type bars, a ribbon vibrating lever, means for operatively connecting said vibrating lever to said universal bar to cause the lever to move one or another distance, and a slide for changing the movement of said vibrating lever and for ositively limiting the movements of said ever to the distances intended, substantially as set forth.

11. In a typewriting machine, the combif nation of a transversely movable carriage, a motor which moves said carriage in one direction, a pair of ribbon spools mounted in front of said carriage, a ribbon feed bar arranged t'o move parallel with the direction of movement of said carriage and having rigidly connected forwardly extending arms, and means for operatively connecting said feed bar to said motor and said arms to said spools, substantially as set forth.

12. In a typewriting machine, the combination of a transversely movable carriage, a motor for moving said carriage in one direction, a pair of ribbon spools mounted in front of said carriage, a feed bar which is reciprocated by said motor in a direction parallel with the direction of movement of said carriage, rigidly connected forwardly extending arms on said feed bar, and means actuated 'by said arms for turning said ribbon spools, substantially as set forth.

13. In a typewriting machine, the combination of a transversely movable carriage, a motor for moving said carriage in one direction, a pair of ribbon spools mounted in front of said carriage, a feed bar arranged 'to slide parallel with the direction of movement of said carriage and having forwardly extending rigidly connected arms adjacent to said spools, an operative connection between said feed bar and said motor, and means for operatively connecting one of said spools to the adjacent arm of said feed bar and disconnecting the other spool from the other arm of said feed bar, substantially as set forth.

14. In a typewriting machine, the combination of a transversely movable carriage, a pair of ribbon spools mounted in front of said carriage, a feed bar arranged beneath said carriage to reciprocate in a direction parallel with the direction of movement of the carriage and having rigidly connected forwardly extending arms adjacent to said spools, means for reciprocating said feed bar, and means for operatively connecting one of said spools to the adjacent arm of said feed bar and disconnecting the other spool from the other arm of said feed bar, subbetween the forwardly extending arms and the spools for rotating one or the other spool, substantially as set forth.

1G. In a typewriting machine, theY combination of a transversely movable carriage, a motor acting to move the carriage in one direction, a sliding bar connected to the motor to reciprocate parallel with the carriage, a pair of forwardly projecting arms rigidly connected to said bar, a pair of ribbon spools, ratchet wheels connected to said spools, a pair of pawls mounted on said arms to act on the ratchet wheels, and means for holding Yone or the other of the pawls out of operative relation to its ratchet wheel, substantially as set forth.

17. In a typewriting machine, the combination of a transversely movable carriage, a motor acting to move the carriage in one direction, aYY sliding bar having a directed positive connection with the motor whereby the bar is caused to move parallel with the carriage at all times, a pair of rigid arms projecting from said sliding bar, ha pairV of ribbon spools, and means for operatively connecting either of said arms to one of the spools, substantially as set forth.

18. In a typewriting machine, the combination of transversely movable carriage, a motor mounted under the carriage and acting to move the carriage in one direction, a sliding bar arranged under the carriage and connected to the motor to move therewith, a pair of forwardly projecting arms rigidly connected to the sliding bar, arpair of ribbon spools, and means whereby either of said arms may be operatively connected to one of the spools, substantially as set forth.

19. In a typewriting machine, the combination of a transversely movable carriage, a rotary motor acting to move the carriage `in one direction, a sliding feed bar connected to the motor tomove at all times therewith, a pair of forwardly projecting arms rigidly connected to the feed bar, a pair of rotary ribbon spools, means for connecting either of said arms to one of the spools in a way to move the spool when the carriage is moved by the motor, and to permit the spool to remain stationary when the carriage is moved in the opposite direction, substantially as set forth.

20. In a typewriting machine, the combination of a transversely movable carriage, a rotary motor acting to move the carriage in one direction, a sliding bar having a pin and cam connection with the motor whereby the bar reciprocates with the carriage, a pair. 'of arms rigidly connected to and projecting from the sliding bar, a pair of rotary ribbon spools, and means for operatively connecting either of said arms to one of the spools, substantially as set forth.

21. In a typewriting machine, thev combination of a transversely movable carriage, ribbon spools arranged in front of the carrlage, a ribbon feed bar arranged at the rear portlon of the machine and having rigidly connected arms extending forwardly toward sald spools, means for reciprocating said feed bar transversely of the machine, and means operated automatically when the ribbon 1s nearly unwound from either spool for operatively connecting one of said arms to the adjacent spool and disconnecting the other arm'from the other spool, substantially as set forth.

22. In a typewriting machine, the combination of ribbon spools, means for turning one or the other of said spools to wind the ribbon thereon, a pair of ribbon guide levers pivoted in rear of said spools and adapted to be moved by the ribbon when the ribbon is nearly unwound from one spool and acting when'turned on their pivots to reverse the direction of feed of the ribbon, and a connecting bar located in rear of the spools and which is pivotally connected to said guide levers in front of the lever pivots, substantially as set forth.

.23. In a typewriting machine, the comb1nat1on of a pair of spools for a ribbon which has an obstruction near each end, mechanism for turning-one or the other of the spools to wind the ribbon thereon, a pair of ribbon Yguide levers adapted to be actuated by said obstructions and acting when turned on their pivots to reverse the direction of feed of the ribbon, a transverse bar located in rear of the spools and pivotally connected to the guide levers to cause them to move in unison, and a spring acting to yieldingly resist the initial movement of the guide levers and to complete the movement thereof, substantially as set forth.

24. In a typewriting machine, the combination of aY pair of spools for a ribbon. mechanism for turning one or the other of the spools t0 wind the ribbon thereon, a pair of levers pivotally mounted at their front ends, a transverse bar connecting the central partsY of the levers and acting to causethe levers to move in unison, and a contractile spring connected to a fixed support in rear of one of the lever pivots and to they lever in front of its pivot whereby the spring is adapted to swing across the lever pivot and to yieldingly hold the lever at either end of its movement, substantially as set forth.

25. In a typewriting machine, the combiy plane of the type bar pivots and connecting saidv levers, and means actuated by said bar for connecting one spool to and disconnecting the other spool from the means for turning the spools, substantially as set forth.

26. In a typewriting machine, the combination of a carriage, a series of upwardly and rearwardly swinging type bars, a pair of ribbon spools mounted in front of the plane of the type bar pivots, and a pair of ars in rear of the plane of the type bar pivots movable parallel with the carriage, and means whereby one of said bars acts to turn the spools and the other to connect said spools alternately to the means vfor turning' the spools, substantially as set forth.

27. ln a typewriting machine, the combination of a transversely movable carriage, a pair of ribbon spools arranged in front of the carriage, a pair of bars arranged transversely of the machine in rear of said spools, means operated by one of said bars for turnin said spools, and means operated by` sald second bar for rendering the turning means for one -of said spools active and the turning means for the other spool inactive, substantially as set forth.

28. In a typewriting machine, the combination of a pair of ribbon spools, a driving ratchet wheel for each spool, a driven pawl for each ratchet wheel, and connections comprising substantially rigid parts flexibly connected which are actuated directly by the ribbon and act to simultaneously lock one of said pawls out of operative position and .release the other pawl fromsuch locked position, substantially as set forth.

29. In a typewriting machine, the combination of a pair of ribbon spools, a driving ratchet wheel for each spool, a driving pawl for each ratchet wheel, a driving pawl controller forv each pawl, a toggle joint for each controller acting when on dead center to positively hold the pawl out of operative position, and means acting to move one toggle joint out of dead center position and simultaneously force the other toggle joint into such position, substantially as set forth.

30. The combination in a collapsible typewriting machine having a series of type bars, and a platen carriage which is movablysupported and is movable from an elevated operative position to a lower inoperative position in rear of the type bars, of ribbon spools arranged in front of the carriage to move up and down therewith, and a reciprocating feed bar which is operatively connected to said spools and is arranged transversely of the machine in position to be lowered with the carriage in rear of the type bars, substantially as set forth.

31. The combination in a collapsible typewriting machine having a series of type bars, and a platen carriage which is movably supported and is movable from an elevated operative position to a lower inoperative position in rear of the type bars, of ribbon spools arranged in front of the carriage to move up and down therewith, a reciprocating feed bar which is operatively connected to said spools and is arranged transversely of the machine in position to be lowered with the carriage in rear of the type bars, and a feed reversing device also arranged in position to be lowered with the carriage in'rear of the type bars, substantially as set forth.

32. The combination in a collapsible typewriting machine having a series oftype bars, a platen carriage which is movably supported and is movable from an elevated operative position to a lower inoperative position in rear of the type bars, of ribbon spools arranged in front of the carriage to move up and down therewith, a reciprocating feed bar which is operatively connected to said Vspools and is arranged transversely of the machine in position vto bev lowered with the carriage in rear vof the type bars, and a feed reversing device and a ribbon vibrating mechanism also arranged in position to be lowered with the carriage in rear of the type bars, substantially as set forth. y

Witness my hand this 17th day of November, 1911.

EMMIT G. LATTA.

Witnesses:

CHESTER U. REID, OTTO A. SGHILLY. 

